صحيح البخاري
Sahih Bukhari
كتاب الأحكام
The Book of Al-Ahkam (Judgements)
باب من رأى للقاضي أن يحكم بعلمه فى أمر الناس إذا لم يخف الظنون والتهمة:
(14) Chapter. Whosoever thinks that a judge can give judgements for the people according to his knowledge if he is not afraid of being suspected or blamed.